April 2007 US Software sales:
Rank - System - April sales - Lifetime US sales

1. NDS - Pokemon Diamond - Nintendo - 1,004,500 - NEW
2. NDS - Pokemon Pearl - Nintendo - 712,000 - NEW
3. Wii - Super Paper Mario - Nintendo - 352,000 - NEW
4. Wii - Wii Play w/ remote - Nintendo - 249,000 (893,000)
5. 360 - Guitar Hero II w/ guitar - Activision - 197,000 (488,000)
6. PS2 Guitar Hero II w/ guitar - Activision - 142,000 (1,850,000+)
7. 360 Spider-Man 3 - Activision - 117,000 - NEW
8. PS2 Spider-Man 3 - Activision - 105,000 - NEW
9. PS2 - God of War II - Sony - 101,000 (934,000)
10. PS2 - MLB 07: The Show - Sony - 79,000 (227,000)

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April 2007 US Hardware sales:
Rank - System - April sales - Lifetime US sales

1. NDS - 471,000 - 10,864,000
2. Wii - 360,000 - 2,470,000
3. PS2 - 194,000 - 38,169,000
4. PSP - 183,000 - 7,439,000
5. 360 - 174,000 - 5,401,000
6. GBA - 84,000 - 35,668,000
7. PS3 - 82,000 - 1,276,000
8. NGC - 13,000 - 11,759,000

Source: Next Gen, GamesAreFun